The clogging of the desoldering gun barrel is a false problem. To avoid this, just keep the trigger pressed for a few more seconds. Not only that, but it's also a very easy solution: just bring the temperature to the maximum and unclog it with the needles supplied. Lastly, all the tools must undergo maintenance. It is good practice to pass the needle through the barrel at the end of each work session and clean the suction pond tank and replace the filters when necessary. Nothing extraordinary. The device if well maintained has nothing to envy to much more expensive devices.